Miyuki's alter ego is Cure Happy.

Miyuki is a bright, kind-hearted, and energetic girl who loves fairytales. She is always happy and optimistic, but seem occasionally naive. Miyuki is also really clumsy

A bright, kind-hearted, and energetic girl

is the original part of Setsuna and the one that represents her past as a Labyrinth member. Much like other generals of Labyrinth, Eas could change back and forth between her human and Labyrinth from by saying the phrase "Switch Over". She was able to summon a Nakewameke by possessing an item or an animal. The diamonds she used to summon Nakewameke were dark red. 

Eas is very stubborn and had a great part of pride, refusing to admit defeat to her partners or let them help her. 

Mana is a cheerful girl who is great at sports and her studies. Her kindness makes her popular at school, and she has the trust of not only the students but adults as well. She often worries about other people, and takes on various problems on her own in order not to burden others. She is great at taking care of people, resolving conflicts, helping friends out with extracurricular activities, and solving problems. However, she often rushes into things before thinking it through.